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常识“正负开方术”是什么意思,起源、典故、生平简介及释义-历史文化

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词汇 正负开方术
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正负开方术算学术语。南宋秦九韶在北宋贾宪增乘开方法基础上提出的开方程序,是为《数书九章》的主要数学方法之一。规定实常为负,相当于现今之将常数项移至方程左端,因而可将随乘随加的过程进行到底。方程的系数在有理数域内没有限制,可正可负,可为分数,亦可为小数。求解的方程有的高达十次。建立方程的过程还进行了无理式的有理化。此术把高次方程求正根的方法推向世界高峰,超前其他文化传统几个世纪。
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